Compilare: main.cpp: In function 'void dfs(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:52:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<L[1].size();i++) ~^~~~~~~~~~~~ main.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[aux.second.second].size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~